Pneumatic tire



` April 26,y 1927.

J. T. CLARK PNEUMATIC TRE Filed Juneze, 1926 Patented Apr. 26, 1927.

Joann. cmnx, or rnovo, Umm.

I FF l PNUHATIC TIRE.

Application filed :une as, 192e. serial N6. 118,619.

' My invention relatesI to tires fon road vehicles and has for its object to' provide a new and elicientpneumatic tire for auto: l mobiles. A further object is to provide a tire for automobiles which will be easily mounted and dismounted and which will not puncture.

A still further object is to provide a V pneumatic tire for automobiles ,which will A require'less air pressure than the ycommonly known tires,- and one which will have a shockabsorbing element Within the outer casing. y v A. Astill further object vis to provide a pneumatic tire which consists of an air in- Hated casing within an inflated outer casing, and which will prevent rim cutting and stone bruising of the outer casing.

' These objects lI accomplish with the tire shown in the accompanying .drawings in which similar numerals and letters of ref? erence indicate like parts throughout the several views and as described in the speciication forming a part of this application andpointed out in the appended claims.

In the drawings of which I have shown the best and most preferred embodiment of my invention and manner of building my tire, Figurev l is a diametrical perspective section of a tire ,with myimprovements therein. Figure, 2 ,is a diametrical section through my tire showing Ithe inner casing therein.

In the drawings I have shown the outer or tread casing as A mounted on any suitable rim B. I provide an 'annular inner lining for the casing A, made of softpure gum rubber C, having its inner edges 1 and 2 free from the inner edges of the casing A, as shown at 3. Ialso 'provide-an vinner casing D having extended edges 4' and 5 thereon, and which edges are made of soft rubber and sealed tothe fabric of the casing D. Bead wires 10 are provided therein to hold the edges of said casing rigid. The

said edges 4 and 5 are bent back upony themselves and formannular grooves 6 and 7 between their edges and the main body of the casing D. Within the said casing D I provide an inner tube Fv which .has a sealed hole 8 therethrough. AThe inner tube F has the regular air valve 11 therein for inflat'- ing it, and through which hole 8 the inflation tube E is passed for inlating the casing A. An iniection tube E is passed through and `secured to the inner casinggD and is in openI connection with the interior of the outer casing A, and has any commonly known check valve carried tlerein. When assembled, as

shown in Figure 1, the edges 1 and 2 of the rubber lining C are placed inthe annular grooves 6 and 7 of the inner casing D and `the inner tube F is placed Within the inner `caslngy D. The edges 4 and 5 of the inner casing D arevplaced between the' edges l and 2 and the 'bead` portion of the out-e1' casing.` The tube E of the inner casing D is passed through the hole -8 in the inner tube F andthe tire is theny mounted on its rim B. Air is then introduced into the inner casing through the valve stem 11 until seal the edges 1 and 2 in the` grooves 6 and so ,i

:sullicient' pressure has been introduced to" may then be introduced into the outer casing through the inflation tube E to any desired amount of pressure and the tire is ready for use. in the outer vcasing A the car will then be running upon vthe inner casing D and the tire will not berim cut or stone bruised. When the outer casing is run with 25 pounds oi' less pressure therein the inner casing will be inflated to about.90 or 100 pounds and should thetire strike a hard object, such as a rock orla railroad track, the outer casing will strike against the inner casing D and the tire will not be injured in any way.

Having thus described my invention I desire to secure by Letters Patent and claim:

`1. A vehicle tire comprising' an outer casing; `a liner secured therein, having its edges free from the edges yof the casing; an inner casing concentric with said outer casing and carried therein; edges on said inner casing' bent back upon. themselves and adapted to fit between the edges of the liner and the edges of the outer casing; an inner tube within said innercasing; and means to inflate both of said casings.

Should the tire become lat 42. A vehicle tire comprising an outer casing having a' rubberl linersecured therein, said liner having its edges free from the edges of the said outer casing; an inner casing concentric with said outer casing. and carried therein; flanged edges on said inner casing bent back upon themselves and adapted' to lit between the edges of the said rubber liner and said outer casing to form an and the outer casing; an inner tube within air-tight seal; and means to iniiate both of said inner casing having a valve stem and l f said casings. valve therein to inflate said tube; and an- 3. A vehicle tire comprising an outer other valve stem' and valve therein securedv 5 casing; a soft rubber liner carried therein through said inner casing and adapted'to be 1'5 and having its edges free from'the edges used to inflate saidl outer casing.` of said outer casing; an inner casing carried -In testimony whereof I have aixed ,my v

in and concentric with said outer casing; ,.signature. 4 flanged edges on said inner casing adapted l v l Y 10 to fit between the edges of the rubber liner ,e Y g JOHN T. CLARK. 

